Updates scripts and notebooks; fixes missing mqtt_setup.py

mqtt_setup.py

+from settings import MQTT_CONFIG
+import paho.mqtt.client as mqtt
+
+
+def on_message(client, userdata, message):
+    m = str(message.payload.decode("utf-8"))
+    print(f'message received {m}')
+    print(f'topic: {message.topic}')
+    print(f'qos: {message.qos}')
+    print(f'retain flag: {message.retain}')
+    client.publish(MQTT_CONFIG['measurements_topic'], f'{m} 45 ohm.m')
+
+
+def mqtt_client_setup():
+    client = mqtt.Client(MQTT_CONFIG['client_id'], protocol=4)  # create new client instance
+    client.connect(MQTT_CONFIG['mqtt_broker'])
+    client.on_message = on_message
+    return client, MQTT_CONFIG['measurements_topic']